What are some terms related to hypothesis testing with which you are already familiar? Why do null and alternative hypotheses have to be mutually exclusive?

2.WK4-DQ2 Response Question:Tail Tests (Min. 150 Word Count)

What is the difference between a left-tailed, two-tailed, and right-tailed test. When would we choose a one-tailed test? How can we tell the direction of the test by looking at a pair of hypotheses? How can we tell which direction (or no direction) to make the hypothesis by looking at the problem statement (research question)?